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The LED on my data logger blinks as if it has already started, but I cant communicate with the software?

If the LED is blinking but you can't communicate with the data logger, check cable connections. Ensure both ends of the interface cable are fully inserted into the data logger, and the PC. Make sure the correct COM port and baud rate are selected. It is helpful to try another computer or interface cable. If the problem persists, contact MadgeTech for return merchandise authorization (RMA) service at